The causes of mycoplasma infection are the following: First, it is caused by poor resistance, if the body resistance is poor, it is easy to be infected by external bacteria, the body’s immunity, that is, the immune system is the main mechanism to fight external bacterial infection, if the body resistance or poor nutrition is easy to be infected by external bacteria. Second, because the human body is in contact with mycoplasma, such as the human body inadvertently contacted mycoplasma, mycoplasma can be attached to the human skin or mucous membrane. When there is an opportunity to enter the blood through the broken skin, thus multiplying in the blood and invading into the cells to cause infection. Third, the normal flora structure of the human body is damaged, because there are many bacteria in the human body, these bacteria also play a certain role in maintaining the immune system of the human body, but also to prevent the infection of external bacteria. When these normal flora is destroyed, mycoplasma has the opportunity to invade the body, resulting in human infection. Fourth, through sexual contact transmission, the male partner for mycoplasma infection, through the sexual behavior of mycoplasma infection to the female reproductive tract.